mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 01:34:14 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
449 lines
12 KiB
C
449 lines
12 KiB
C
/**
|
|
* \file drm_agpsupport.h
|
|
* DRM support for AGP/GART backend
|
|
*
|
|
* \author Rickard E. (Rik) Faith <faith@valinux.com>
|
|
* \author Gareth Hughes <gareth@valinux.com>
|
|
*/
|
|
|
|
/*
|
|
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
|
|
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include "drmP.h"
|
|
#include <linux/module.h>
|
|
|
|
#if __OS_HAS_AGP
|
|
|
|
/**
|
|
* AGP information ioctl.
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a (output) drm_agp_info structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device has been initialized and acquired and fills in the
|
|
* drm_agp_info structure with the information in drm_agp_head::agp_info.
|
|
*/
|
|
int drm_agp_info(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
DRM_AGP_KERN *kern;
|
|
drm_agp_info_t info;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
|
|
kern = &dev->agp->agp_info;
|
|
info.agp_version_major = kern->version.major;
|
|
info.agp_version_minor = kern->version.minor;
|
|
info.mode = kern->mode;
|
|
info.aperture_base = kern->aper_base;
|
|
info.aperture_size = kern->aper_size * 1024 * 1024;
|
|
info.memory_allowed = kern->max_memory << PAGE_SHIFT;
|
|
info.memory_used = kern->current_memory << PAGE_SHIFT;
|
|
info.id_vendor = kern->device->vendor;
|
|
info.id_device = kern->device->device;
|
|
|
|
if (copy_to_user((drm_agp_info_t __user *)arg, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Acquire the AGP device (ioctl).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg user argument.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device hasn't been acquired before and calls
|
|
* agp_acquire().
|
|
*/
|
|
int drm_agp_acquire(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
|
|
if (!dev->agp)
|
|
return -ENODEV;
|
|
if (dev->agp->acquired)
|
|
return -EBUSY;
|
|
if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev)))
|
|
return -ENODEV;
|
|
dev->agp->acquired = 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Release the AGP device (ioctl).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg user argument.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device has been acquired and calls agp_backend_release().
|
|
*/
|
|
int drm_agp_release(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
agp_backend_release(dev->agp->bridge);
|
|
dev->agp->acquired = 0;
|
|
return 0;
|
|
|
|
}
|
|
|
|
/**
|
|
* Release the AGP device.
|
|
*
|
|
* Calls agp_backend_release().
|
|
*/
|
|
void drm_agp_do_release(drm_device_t *dev)
|
|
{
|
|
agp_backend_release(dev->agp->bridge);
|
|
}
|
|
|
|
/**
|
|
* Enable the AGP bus.
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_agp_mode structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device has been acquired but not enabled, and calls
|
|
* agp_enable().
|
|
*/
|
|
int drm_agp_enable(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_agp_mode_t mode;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&mode, (drm_agp_mode_t __user *)arg, sizeof(mode)))
|
|
return -EFAULT;
|
|
|
|
dev->agp->mode = mode.mode;
|
|
agp_enable(dev->agp->bridge, mode.mode);
|
|
dev->agp->base = dev->agp->agp_info.aper_base;
|
|
dev->agp->enabled = 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Allocate AGP memory.
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_agp_buffer structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device is present and has been acquired, allocates the
|
|
* memory via alloc_agp() and creates a drm_agp_mem entry for it.
|
|
*/
|
|
int drm_agp_alloc(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_agp_buffer_t request;
|
|
drm_agp_mem_t *entry;
|
|
DRM_AGP_MEM *memory;
|
|
unsigned long pages;
|
|
u32 type;
|
|
drm_agp_buffer_t __user *argp = (void __user *)arg;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
if (copy_from_user(&request, argp, sizeof(request)))
|
|
return -EFAULT;
|
|
if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
|
|
return -ENOMEM;
|
|
|
|
memset(entry, 0, sizeof(*entry));
|
|
|
|
pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
|
|
type = (u32) request.type;
|
|
|
|
if (!(memory = drm_alloc_agp(dev->agp->bridge, pages, type))) {
|
|
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
entry->handle = (unsigned long)memory->key + 1;
|
|
entry->memory = memory;
|
|
entry->bound = 0;
|
|
entry->pages = pages;
|
|
entry->prev = NULL;
|
|
entry->next = dev->agp->memory;
|
|
if (dev->agp->memory)
|
|
dev->agp->memory->prev = entry;
|
|
dev->agp->memory = entry;
|
|
|
|
request.handle = entry->handle;
|
|
request.physical = memory->physical;
|
|
|
|
if (copy_to_user(argp, &request, sizeof(request))) {
|
|
dev->agp->memory = entry->next;
|
|
dev->agp->memory->prev = NULL;
|
|
drm_free_agp(memory, pages);
|
|
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Search for the AGP memory entry associated with a handle.
|
|
*
|
|
* \param dev DRM device structure.
|
|
* \param handle AGP memory handle.
|
|
* \return pointer to the drm_agp_mem structure associated with \p handle.
|
|
*
|
|
* Walks through drm_agp_head::memory until finding a matching handle.
|
|
*/
|
|
static drm_agp_mem_t *drm_agp_lookup_entry(drm_device_t *dev,
|
|
unsigned long handle)
|
|
{
|
|
drm_agp_mem_t *entry;
|
|
|
|
for (entry = dev->agp->memory; entry; entry = entry->next) {
|
|
if (entry->handle == handle)
|
|
return entry;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Unbind AGP memory from the GATT (ioctl).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_agp_binding structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device is present and acquired, looks-up the AGP memory
|
|
* entry and passes it to the unbind_agp() function.
|
|
*/
|
|
int drm_agp_unbind(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_agp_binding_t request;
|
|
drm_agp_mem_t *entry;
|
|
int ret;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
if (copy_from_user(&request, (drm_agp_binding_t __user *)arg, sizeof(request)))
|
|
return -EFAULT;
|
|
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
|
|
return -EINVAL;
|
|
if (!entry->bound)
|
|
return -EINVAL;
|
|
ret = drm_unbind_agp(entry->memory);
|
|
if (ret == 0)
|
|
entry->bound = 0;
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Bind AGP memory into the GATT (ioctl)
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_agp_binding structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device is present and has been acquired and that no memory
|
|
* is currently bound into the GATT. Looks-up the AGP memory entry and passes
|
|
* it to bind_agp() function.
|
|
*/
|
|
int drm_agp_bind(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_agp_binding_t request;
|
|
drm_agp_mem_t *entry;
|
|
int retcode;
|
|
int page;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
if (copy_from_user(&request, (drm_agp_binding_t __user *)arg, sizeof(request)))
|
|
return -EFAULT;
|
|
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
|
|
return -EINVAL;
|
|
if (entry->bound)
|
|
return -EINVAL;
|
|
page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
|
|
if ((retcode = drm_bind_agp(entry->memory, page)))
|
|
return retcode;
|
|
entry->bound = dev->agp->base + (page << PAGE_SHIFT);
|
|
DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
|
|
dev->agp->base, entry->bound);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Free AGP memory (ioctl).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_agp_buffer structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies the AGP device is present and has been acquired and looks up the
|
|
* AGP memory entry. If the memory it's currently bound, unbind it via
|
|
* unbind_agp(). Frees it via free_agp() as well as the entry itself
|
|
* and unlinks from the doubly linked list it's inserted in.
|
|
*/
|
|
int drm_agp_free(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_agp_buffer_t request;
|
|
drm_agp_mem_t *entry;
|
|
|
|
if (!dev->agp || !dev->agp->acquired)
|
|
return -EINVAL;
|
|
if (copy_from_user(&request, (drm_agp_buffer_t __user *)arg, sizeof(request)))
|
|
return -EFAULT;
|
|
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
|
|
return -EINVAL;
|
|
if (entry->bound)
|
|
drm_unbind_agp(entry->memory);
|
|
|
|
if (entry->prev)
|
|
entry->prev->next = entry->next;
|
|
else
|
|
dev->agp->memory = entry->next;
|
|
|
|
if (entry->next)
|
|
entry->next->prev = entry->prev;
|
|
|
|
drm_free_agp(entry->memory, entry->pages);
|
|
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Initialize the AGP resources.
|
|
*
|
|
* \return pointer to a drm_agp_head structure.
|
|
*
|
|
*/
|
|
drm_agp_head_t *drm_agp_init(drm_device_t *dev)
|
|
{
|
|
drm_agp_head_t *head = NULL;
|
|
|
|
if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
|
|
return NULL;
|
|
memset((void *)head, 0, sizeof(*head));
|
|
head->bridge = agp_find_bridge(dev->pdev);
|
|
if (!head->bridge) {
|
|
if (!(head->bridge = agp_backend_acquire(dev->pdev))) {
|
|
drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
|
|
return NULL;
|
|
}
|
|
agp_copy_info(head->bridge, &head->agp_info);
|
|
agp_backend_release(head->bridge);
|
|
} else {
|
|
agp_copy_info(head->bridge, &head->agp_info);
|
|
}
|
|
if (head->agp_info.chipset == NOT_SUPPORTED) {
|
|
drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
|
|
return NULL;
|
|
}
|
|
head->memory = NULL;
|
|
#if LINUX_VERSION_CODE <= 0x020408
|
|
head->cant_use_aperture = 0;
|
|
head->page_mask = ~(0xfff);
|
|
#else
|
|
head->cant_use_aperture = head->agp_info.cant_use_aperture;
|
|
head->page_mask = head->agp_info.page_mask;
|
|
#endif
|
|
|
|
return head;
|
|
}
|
|
|
|
/** Calls agp_allocate_memory() */
|
|
DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type)
|
|
{
|
|
return agp_allocate_memory(bridge, pages, type);
|
|
}
|
|
|
|
/** Calls agp_free_memory() */
|
|
int drm_agp_free_memory(DRM_AGP_MEM *handle)
|
|
{
|
|
if (!handle)
|
|
return 0;
|
|
agp_free_memory(handle);
|
|
return 1;
|
|
}
|
|
|
|
/** Calls agp_bind_memory() */
|
|
int drm_agp_bind_memory(DRM_AGP_MEM *handle, off_t start)
|
|
{
|
|
if (!handle)
|
|
return -EINVAL;
|
|
return agp_bind_memory(handle, start);
|
|
}
|
|
|
|
/** Calls agp_unbind_memory() */
|
|
int drm_agp_unbind_memory(DRM_AGP_MEM *handle)
|
|
{
|
|
if (!handle)
|
|
return -EINVAL;
|
|
return agp_unbind_memory(handle);
|
|
}
|
|
|
|
#endif /* __OS_HAS_AGP */
|